Oona

Oona is an English-letter spelling of the Irish name Úna. The name is traditionally associated with the Irish word for lamb, although the older derivation is not completely certain. The double o makes one familiar pronunciation of Úna more apparent to readers who may not know Irish spelling conventions.

Oonagh is another form in the same family, while Una can belong to more than one naming tradition depending on the language. The spelling Oona is also associated with Oona O'Neill, daughter of playwright Eugene O'Neill and wife of Charlie Chaplin. For a family choosing the name, its Irish background, a relative's name, or that cultural connection may matter more than settling a single ancient meaning. Its brief written form still carries a distinctive history.